moginn is



i ofthe city, county, and State of'New York,

UNITED STATES y WILLIAM T. MUGINNIS,

PATENT OEEICE. i

or NEET YORK, N. Y.

BELL.

SPECIFICATION forming` part of Letters Patent No. 272,144, datedFebruary 13, 1883.

Application filed January 2, 1883. (No model.)

To cllwhom it may concern:

Be it known that I, WILLIAM T. MeGINNIs,

haveinvexed a new and useful Improvement in DunbBells5 and I do herebydeclare'that the following is a full and exact description thereof,reference being had to theaccom panying drawing, and to the letters ofreference. marked thereon, making a part vof this specification. Myinvention relates to dumb-bells for calisthenic purposes.4

It has for its object the production of an ex ercising-Weight-whichshall he not only neat and attractive, but by reason ot' its peculiarcharacteristics will gently stimulate the nervous tissues and serve toinduce a use ot' the device for hygienic purposes.

It consists ot' a steel bar enlarged at its ends in the form of adumb-bell, and magnetized to saturation, so as to be, in fact, apowerful permanent magnet, and which may be combined with a longitudinalcore of brass or copper.

My improved dumb-bell is produced from a metallic bar, preferably ofhardened steel, which is forged in [he shape illustrated in theaccompanying drawing, `and thereby adapted to be most easily grasped inthe hand, andis made of a size which shall embody a comparatively lightweight.

The dumb-bell, of steel or iron, is converted into a magnet bysubmitting it to the action of the current of a dynamomachine,'or byother of the Well-known processes for the magnetization of iron. Beingthus magnetized, it

`of the magnet.

`I contemplate as a modification of my invention the insertionlongitudinally within the magnetic dumb-bell of a central core of vbrassor copper, (see dotted lines in the drawing,) or of strips of copper orzinc, to increase the magnetic action ot' the device.

I claim as my invention- As a new article ot' manufacture, a magneticdumbbell, substantiallyas herein described.

In testimony whereof I have .signed my name to this specification in thepresence of two subscribing Witnesses. 1

WILLIAM T. MCGINNIS. i

Witnesses:

DAVID A. BURR, J oHN A. ELLIS.

